After watching this movie, I think of a choice often appears on young couples fall in love: To love or bread? In fact, this question is a trap. The real answer is, it is necessary to both love and have bread. According to Maslow's theory of demand, the lowest level of demand is for bread only. But what human need are more than bread. To love, or other higher-level needs will naturally emerge after people have necessary bread.
By the same token, the old man sweeps the streets in the film although needs bread, but also needs self-esteem and cares. Hence, the clerk of bakery shop asks him to help moving the sign of shop (in fact, this is not necessary). And then she uses this excuse to send bread to that old man as a gift. The shop clerk could choose to send bread to the old man directly. However, there will be no or less some subtle feelings among people. This film could lets us think more about this kind of "interpersonal art" deeply.